• Updated 1 Nov, 10:02 UTC
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Kimi K3.1 Pro vs Nemotron 3 Ultra

6 prompts both ran·Specs and numbers·Change models

Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, Nemotron 3 Ultra took 14 min 14 s and $0.15 at list price. Kimi K3.1 Pro took 2.3× as long and cost 8.6× as much.

Kimi K3.1 Pro

Moonshot AI · $10.00/M out · 1,168 HN pts

Nemotron 3 Ultra

NVIDIA · $2.40/M out · free route · 48 HN pts

Pelican

Generate an SVG of a pelican riding a bicycle

Kimi K3.1 Pro's SVG for the "Pelican riding a bicycle" prompt

Kimi K3.1 Pro

5 min 20 s$0.1616k tokensAPI
Nemotron 3 Ultra's SVG for the "Pelican riding a bicycle" prompt

Nemotron 3 Ultra

56 s$0.0114.7k tokensAPI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of Kimi K3.1 Pro's page for the "Wristwatch that shows the current time" prompt

Kimi K3.1 Pro

7 min 57 s$0.2525k tokensAPI
Still of Nemotron 3 Ultra's page for the "Wristwatch that shows the current time" prompt

Nemotron 3 Ultra

2 min 56 s$0.02912k tokensAPI

Landing

Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.

Still of Kimi K3.1 Pro's page for the "Landing page for a cargo bike workshop" prompt

Kimi K3.1 Pro

7 min 20 s$0.3737k tokensAPI
Still of Nemotron 3 Ultra's page for the "Landing page for a cargo bike workshop" prompt

Nemotron 3 Ultra

4 min 25 s$0.05824k tokensAPI

Breakout

Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.

Still of Kimi K3.1 Pro's page for the "Playable Breakout" prompt

Kimi K3.1 Pro

8 min 18 s$0.3535k tokensAPI
Still of Nemotron 3 Ultra's page for the "Playable Breakout" prompt

Nemotron 3 Ultra

3 min 39 s$0.03314k tokensAPI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

Kimi K3.1 Pro's SVG for the "Bookshop logo" prompt

Kimi K3.1 Pro

3 min 1 s$0.1313k tokensAPI
Nemotron 3 Ultra's SVG for the "Bookshop logo" prompt

Nemotron 3 Ultra

1 min 42 s$0.0135.6k tokensAPI

About

Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.

Patchbay is a three-person studio in Rotterdam devoted to keeping vintage synthesizers alive, playable, and full of character. We work on instruments that have spent decades in studios, bedrooms, and tour cases, and we believe each one deserves more than a quick fix. From drifting oscillators and noisy sliders to tired keybeds and mysterious faults, we take the time to listen, diagnose, and repair with care.

Our approach combines patient troubleshooting, period-correct components where possible, and a deep respect for the original sound. We do not believe in erasing an instrument’s history; we preserve the quirks that make it worth loving. Whether your synthesizer needs a full overhaul or a little help getting back on stage, you will always know who is working on it and why. Patchbay exists for the joy of switching on an old machine and hearing it come back to life.

Kimi K3.1 Pro

23 s$0.0121.1k tokensAPI

Patchbay began in a narrow workshop on the edge of Rotterdam’s Noord district, where the hum of aging oscillators meets the rhythm of the city’s canals. Founded by three synth enthusiasts — a former studio engineer, a circuit designer, and a musician who still plays the same Juno‑106 he bought in 1986 — the studio grew from late‑night repair sessions into a dedicated space for restoring the instruments that shaped electronic music’s golden era. Every unit that passes through our bench is treated with the same reverence we give a first‑press vinyl: capacitors are swapped, contacts cleaned, and calibration traced back to original service manuals. We don’t just fix synthesizers; we listen to their history, understand their quirks, and return them to the stage or studio ready to inspire the next generation of sound. Patchbay is small, intentional, and built on the belief that vintage gear deserves a future as vivid as its past.

Nemotron 3 Ultra

36 s$0.0031.1k tokensAPI

Specs and numbers

Kimi K3.1 ProNemotron 3 Ultra
MakerMoonshot AINVIDIA
Made inChinaUS
Released23 Oct 20264 Jun 2026
Price in, per M tokens$2.00free route (list $0.60/M)
Price out, per M tokens$10.00free route (list $2.40/M)
Context1,048,576 tokens262,144 tokens
Weightsclosedopen
Hacker News points1,16848
Time for the six prompts32 min 17 s14 min 14 s
List price of the six prompts$1.27$0.15

Nemotron 3 Ultra was cheaper: $1.12 less at list price, and less on each of the 6 prompts. Nemotron 3 Ultra was faster: 18 min 3 s less in total, and faster on 5 of the 6 prompts.

In the recording, Kimi K3.1 Pro's Breakout game plays; Nemotron 3 Ultra's loads but doesn't start.

Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%; Nemotron 3 Ultra was not in it. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks; Nemotron 3 Ultra was not in it.

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